key_tests.cpp
1 // Copyright (c) 2012-present The Bitcoin Core developers 2 // Distributed under the MIT software license, see the accompanying 3 // file COPYING or http://www.opensource.org/licenses/mit-license.php. 4 5 #include <key.h> 6 7 #include <common/system.h> 8 #include <key_io.h> 9 #include <span.h> 10 #include <streams.h> 11 #include <secp256k1_extrakeys.h> 12 #include <test/util/random.h> 13 #include <test/util/setup_common.h> 14 #include <uint256.h> 15 #include <util/strencodings.h> 16 #include <util/string.h> 17 18 #include <string> 19 #include <vector> 20 21 #include <boost/test/unit_test.hpp> 22 23 using namespace util::hex_literals; 24 using util::ToString; 25 26 static const std::string strSecret1 = "5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj"; 27 static const std::string strSecret2 = "5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3"; 28 static const std::string strSecret1C = "Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw"; 29 static const std::string strSecret2C = "L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g"; 30 static const std::string addr1 = "1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ"; 31 static const std::string addr2 = "1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ"; 32 static const std::string addr1C = "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs"; 33 static const std::string addr2C = "1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs"; 34 35 static const std::string strAddressBad = "1HV9Lc3sNHZxwj4Zk6fB38tEmBryq2cBiF"; 36 37 38 BOOST_FIXTURE_TEST_SUITE(key_tests, BasicTestingSetup) 39 40 BOOST_AUTO_TEST_CASE(key_test1) 41 { 42 CKey key1 = DecodeSecret(strSecret1); 43 BOOST_CHECK(key1.IsValid() && !key1.IsCompressed()); 44 CKey key2 = DecodeSecret(strSecret2); 45 BOOST_CHECK(key2.IsValid() && !key2.IsCompressed()); 46 CKey key1C = DecodeSecret(strSecret1C); 47 BOOST_CHECK(key1C.IsValid() && key1C.IsCompressed()); 48 CKey key2C = DecodeSecret(strSecret2C); 49 BOOST_CHECK(key2C.IsValid() && key2C.IsCompressed()); 50 CKey bad_key = DecodeSecret(strAddressBad); 51 BOOST_CHECK(!bad_key.IsValid()); 52 53 CPubKey pubkey1 = key1. GetPubKey(); 54 CPubKey pubkey2 = key2. GetPubKey(); 55 CPubKey pubkey1C = key1C.GetPubKey(); 56 CPubKey pubkey2C = key2C.GetPubKey(); 57 58 BOOST_CHECK(key1.VerifyPubKey(pubkey1)); 59 BOOST_CHECK(!key1.VerifyPubKey(pubkey1C)); 60 BOOST_CHECK(!key1.VerifyPubKey(pubkey2)); 61 BOOST_CHECK(!key1.VerifyPubKey(pubkey2C)); 62 63 BOOST_CHECK(!key1C.VerifyPubKey(pubkey1)); 64 BOOST_CHECK(key1C.VerifyPubKey(pubkey1C)); 65 BOOST_CHECK(!key1C.VerifyPubKey(pubkey2)); 66 BOOST_CHECK(!key1C.VerifyPubKey(pubkey2C)); 67 68 BOOST_CHECK(!key2.VerifyPubKey(pubkey1)); 69 BOOST_CHECK(!key2.VerifyPubKey(pubkey1C)); 70 BOOST_CHECK(key2.VerifyPubKey(pubkey2)); 71 BOOST_CHECK(!key2.VerifyPubKey(pubkey2C)); 72 73 BOOST_CHECK(!key2C.VerifyPubKey(pubkey1)); 74 BOOST_CHECK(!key2C.VerifyPubKey(pubkey1C)); 75 BOOST_CHECK(!key2C.VerifyPubKey(pubkey2)); 76 BOOST_CHECK(key2C.VerifyPubKey(pubkey2C)); 77 78 BOOST_CHECK(DecodeDestination(addr1) == CTxDestination(PKHash(pubkey1))); 79 BOOST_CHECK(DecodeDestination(addr2) == CTxDestination(PKHash(pubkey2))); 80 BOOST_CHECK(DecodeDestination(addr1C) == CTxDestination(PKHash(pubkey1C))); 81 BOOST_CHECK(DecodeDestination(addr2C) == CTxDestination(PKHash(pubkey2C))); 82 83 for (int n=0; n<16; n++) 84 { 85 std::string strMsg = strprintf("Very secret message %i: 11", n); 86 uint256 hashMsg = Hash(strMsg); 87 88 // normal signatures 89 90 std::vector<unsigned char> sign1, sign2, sign1C, sign2C; 91 92 BOOST_CHECK(key1.Sign (hashMsg, sign1)); 93 BOOST_CHECK(key2.Sign (hashMsg, sign2)); 94 BOOST_CHECK(key1C.Sign(hashMsg, sign1C)); 95 BOOST_CHECK(key2C.Sign(hashMsg, sign2C)); 96 97 BOOST_CHECK( pubkey1.Verify(hashMsg, sign1)); 98 BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2)); 99 BOOST_CHECK( pubkey1.Verify(hashMsg, sign1C)); 100 BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2C)); 101 102 BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1)); 103 BOOST_CHECK( pubkey2.Verify(hashMsg, sign2)); 104 BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1C)); 105 BOOST_CHECK( pubkey2.Verify(hashMsg, sign2C)); 106 107 BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1)); 108 BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2)); 109 BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1C)); 110 BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2C)); 111 112 BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1)); 113 BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2)); 114 BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1C)); 115 BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2C)); 116 117 // compact signatures (with key recovery) 118 119 std::vector<unsigned char> csign1, csign2, csign1C, csign2C; 120 121 BOOST_CHECK(key1.SignCompact (hashMsg, csign1)); 122 BOOST_CHECK(key2.SignCompact (hashMsg, csign2)); 123 BOOST_CHECK(key1C.SignCompact(hashMsg, csign1C)); 124 BOOST_CHECK(key2C.SignCompact(hashMsg, csign2C)); 125 126 CPubKey rkey1, rkey2, rkey1C, rkey2C; 127 128 BOOST_CHECK(rkey1.RecoverCompact (hashMsg, csign1)); 129 BOOST_CHECK(rkey2.RecoverCompact (hashMsg, csign2)); 130 BOOST_CHECK(rkey1C.RecoverCompact(hashMsg, csign1C)); 131 BOOST_CHECK(rkey2C.RecoverCompact(hashMsg, csign2C)); 132 133 BOOST_CHECK(rkey1 == pubkey1); 134 BOOST_CHECK(rkey2 == pubkey2); 135 BOOST_CHECK(rkey1C == pubkey1C); 136 BOOST_CHECK(rkey2C == pubkey2C); 137 } 138 139 // test deterministic signing 140 141 std::vector<unsigned char> detsig, detsigc; 142 std::string strMsg = "Very deterministic message"; 143 uint256 hashMsg = Hash(strMsg); 144 BOOST_CHECK(key1.Sign(hashMsg, detsig)); 145 BOOST_CHECK(key1C.Sign(hashMsg, detsigc)); 146 BOOST_CHECK(detsig == detsigc); 147 BOOST_CHECK_EQUAL(HexStr(detsig), "304402205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d022014ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"); 148 149 BOOST_CHECK(key2.Sign(hashMsg, detsig)); 150 BOOST_CHECK(key2C.Sign(hashMsg, detsigc)); 151 BOOST_CHECK(detsig == detsigc); 152 BOOST_CHECK_EQUAL(HexStr(detsig), "3044022052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd5022061d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"); 153 154 BOOST_CHECK(key1.SignCompact(hashMsg, detsig)); 155 BOOST_CHECK(key1C.SignCompact(hashMsg, detsigc)); 156 BOOST_CHECK_EQUAL(HexStr(detsig), "1c5dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"); 157 BOOST_CHECK_EQUAL(HexStr(detsigc), "205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"); 158 159 BOOST_CHECK(key2.SignCompact(hashMsg, detsig)); 160 BOOST_CHECK(key2C.SignCompact(hashMsg, detsigc)); 161 BOOST_CHECK_EQUAL(HexStr(detsig), "1c52d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"); 162 BOOST_CHECK_EQUAL(HexStr(detsigc), "2052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"); 163 } 164 165 BOOST_AUTO_TEST_CASE(key_signature_tests) 166 { 167 // When entropy is specified, we should see at least one high R signature within 20 signatures 168 CKey key = DecodeSecret(strSecret1); 169 std::string msg = "A message to be signed"; 170 uint256 msg_hash = Hash(msg); 171 std::vector<unsigned char> sig; 172 bool found = false; 173 174 for (int i = 1; i <=20; ++i) { 175 sig.clear(); 176 BOOST_CHECK(key.Sign(msg_hash, sig, false, i)); 177 found = sig[3] == 0x21 && sig[4] == 0x00; 178 if (found) { 179 break; 180 } 181 } 182 BOOST_CHECK(found); 183 184 // When entropy is not specified, we should always see low R signatures that are less than or equal to 70 bytes in 256 tries 185 // The low R signatures should always have the value of their "length of R" byte less than or equal to 32 186 // We should see at least one signature that is less than 70 bytes. 187 bool found_small = false; 188 bool found_big = false; 189 bool bad_sign = false; 190 for (int i = 0; i < 256; ++i) { 191 sig.clear(); 192 std::string msg = "A message to be signed" + ToString(i); 193 msg_hash = Hash(msg); 194 if (!key.Sign(msg_hash, sig)) { 195 bad_sign = true; 196 break; 197 } 198 // sig.size() > 70 implies sig[3] > 32, because S is always low. 199 // But check both conditions anyway, just in case this implication is broken for some reason 200 if (sig[3] > 32 || sig.size() > 70) { 201 found_big = true; 202 break; 203 } 204 found_small |= sig.size() < 70; 205 } 206 BOOST_CHECK(!bad_sign); 207 BOOST_CHECK(!found_big); 208 BOOST_CHECK(found_small); 209 } 210 211 static CPubKey UnserializePubkey(const std::vector<uint8_t>& data) 212 { 213 DataStream stream{}; 214 stream << data; 215 CPubKey pubkey; 216 stream >> pubkey; 217 return pubkey; 218 } 219 220 static unsigned int GetLen(unsigned char chHeader) 221 { 222 if (chHeader == 2 || chHeader == 3) 223 return CPubKey::COMPRESSED_SIZE; 224 if (chHeader == 4 || chHeader == 6 || chHeader == 7) 225 return CPubKey::SIZE; 226 return 0; 227 } 228 229 static void CmpSerializationPubkey(const CPubKey& pubkey) 230 { 231 DataStream stream{}; 232 stream << pubkey; 233 CPubKey pubkey2; 234 stream >> pubkey2; 235 BOOST_CHECK(pubkey == pubkey2); 236 } 237 238 BOOST_AUTO_TEST_CASE(pubkey_unserialize) 239 { 240 for (uint8_t i = 2; i <= 7; ++i) { 241 CPubKey key = UnserializePubkey({0x02}); 242 BOOST_CHECK(!key.IsValid()); 243 CmpSerializationPubkey(key); 244 key = UnserializePubkey(std::vector<uint8_t>(GetLen(i), i)); 245 CmpSerializationPubkey(key); 246 if (i == 5) { 247 BOOST_CHECK(!key.IsValid()); 248 } else { 249 BOOST_CHECK(key.IsValid()); 250 } 251 } 252 } 253 254 BOOST_AUTO_TEST_CASE(bip340_test_vectors) 255 { 256 static const std::vector<std::pair<std::array<std::string, 3>, bool>> VECTORS = { 257 {{"F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}, true}, 258 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}, true}, 259 {{"DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}, true}, 260 {{"25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}, true}, 261 {{"D69C3509BB99E412E68B0FE8544E72837DFA30746D8BE2AA65975F29D22DC7B9", "4DF3C3F68FCC83B27E9D42C90431A72499F17875C81A599B566C9889B9696703", "00000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6376AFB1548AF603B3EB45C9F8207DEE1060CB71C04E80F593060B07D28308D7F4"}, true}, 262 {{"EEFDEA4CDB677750A420FEE807EACF21EB9898AE79B9768766E4FAA04A2D4A34", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false}, 263 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFF97BD5755EEEA420453A14355235D382F6472F8568A18B2F057A14602975563CC27944640AC607CD107AE10923D9EF7A73C643E166BE5EBEAFA34B1AC553E2"}, false}, 264 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "1FA62E331EDBC21C394792D2AB1100A7B432B013DF3F6FF4F99FCB33E0E1515F28890B3EDB6E7189B630448B515CE4F8622A954CFE545735AAEA5134FCCDB2BD"}, false}, 265 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769961764B3AA9B2FFCB6EF947B6887A226E8D7C93E00C5ED0C1834FF0D0C2E6DA6"}, false}, 266 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "0000000000000000000000000000000000000000000000000000000000000000123DDA8328AF9C23A94C1FEECFD123BA4FB73476F0D594DCB65C6425BD186051"}, false}, 267 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "00000000000000000000000000000000000000000000000000000000000000017615FBAF5AE28864013C099742DEADB4DBA87F11AC6754F93780D5A1837CF197"}, false}, 268 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "4A298DACAE57395A15D0795DDBFD1DCB564DA82B0F269BC70A74F8220429BA1D69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false}, 269 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false}, 270 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"}, false}, 271 {{"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false} 272 }; 273 274 for (const auto& test : VECTORS) { 275 auto pubkey = ParseHex(test.first[0]); 276 auto msg = ParseHex(test.first[1]); 277 auto sig = ParseHex(test.first[2]); 278 BOOST_CHECK_EQUAL(XOnlyPubKey(pubkey).VerifySchnorr(uint256(msg), sig), test.second); 279 } 280 281 static const std::vector<std::array<std::string, 5>> SIGN_VECTORS = { 282 {{"0000000000000000000000000000000000000000000000000000000000000003", "F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}}, 283 {{"B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF", "DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "0000000000000000000000000000000000000000000000000000000000000001", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}}, 284 {{"C90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B14E5C9", "DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "C87AA53824B4D7AE2EB035A2B5BBBCCC080E76CDC6D1692C4B0B62D798E6D906", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}}, 285 {{"0B432B2677937381AEF05BB02A66ECD012773062CF3FA2549E44F58ED2401710", "25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}}, 286 }; 287 288 for (const auto& [sec_hex, pub_hex, aux_hex, msg_hex, sig_hex] : SIGN_VECTORS) { 289 auto sec = ParseHex(sec_hex); 290 auto pub = ParseHex(pub_hex); 291 uint256 aux256(ParseHex(aux_hex)); 292 uint256 msg256(ParseHex(msg_hex)); 293 auto sig = ParseHex(sig_hex); 294 unsigned char sig64[64]; 295 296 // Run the untweaked test vectors above, comparing with exact expected signature. 297 CKey key; 298 key.Set(sec.begin(), sec.end(), true); 299 XOnlyPubKey pubkey(key.GetPubKey()); 300 BOOST_CHECK(std::equal(pubkey.begin(), pubkey.end(), pub.begin(), pub.end())); 301 bool ok = key.SignSchnorr(msg256, sig64, nullptr, aux256); 302 BOOST_CHECK(ok); 303 BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig); 304 // Verify those signatures for good measure. 305 BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64)); 306 307 // Repeat the same check, but use the KeyPair directly without any merkle tweak 308 KeyPair keypair = key.ComputeKeyPair(/*merkle_root=*/nullptr); 309 bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256); 310 BOOST_CHECK(kp_ok); 311 BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64)); 312 BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig); 313 314 // Do 10 iterations where we sign with a random Merkle root to tweak, 315 // and compare against the resulting tweaked keys, with random aux. 316 // In iteration i=0 we tweak with empty Merkle tree. 317 for (int i = 0; i < 10; ++i) { 318 uint256 merkle_root; 319 if (i) merkle_root = m_rng.rand256(); 320 auto tweaked = pubkey.CreateTapTweak(i ? &merkle_root : nullptr); 321 BOOST_CHECK(tweaked); 322 XOnlyPubKey tweaked_key = tweaked->first; 323 aux256 = m_rng.rand256(); 324 bool ok = key.SignSchnorr(msg256, sig64, &merkle_root, aux256); 325 BOOST_CHECK(ok); 326 BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64)); 327 328 // Repeat the same check, but use the KeyPair class directly 329 KeyPair keypair = key.ComputeKeyPair(&merkle_root); 330 bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256); 331 BOOST_CHECK(kp_ok); 332 BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64)); 333 } 334 } 335 } 336 337 BOOST_AUTO_TEST_CASE(key_ellswift) 338 { 339 for (const auto& secret : {strSecret1, strSecret2, strSecret1C, strSecret2C}) { 340 CKey key = DecodeSecret(secret); 341 BOOST_CHECK(key.IsValid()); 342 343 uint256 ent32 = m_rng.rand256(); 344 auto ellswift = key.EllSwiftCreate(std::as_bytes(std::span{ent32})); 345 346 CPubKey decoded_pubkey = ellswift.Decode(); 347 if (!key.IsCompressed()) { 348 // The decoding constructor returns a compressed pubkey. If the 349 // original was uncompressed, we must decompress the decoded one 350 // to compare. 351 decoded_pubkey.Decompress(); 352 } 353 BOOST_CHECK(key.GetPubKey() == decoded_pubkey); 354 } 355 } 356 357 BOOST_AUTO_TEST_CASE(bip341_test_h) 358 { 359 constexpr auto G_uncompressed{"0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8"_hex}; 360 HashWriter hw; 361 hw.write(G_uncompressed); 362 XOnlyPubKey H{hw.GetSHA256()}; 363 BOOST_CHECK(XOnlyPubKey::NUMS_H == H); 364 } 365 366 BOOST_AUTO_TEST_CASE(key_schnorr_tweak_smoke_test) 367 { 368 // Sanity check to ensure we get the same tweak using CPubKey vs secp256k1 functions 369 secp256k1_context* secp256k1_context_sign = secp256k1_context_create(SECP256K1_CONTEXT_NONE); 370 371 CKey key; 372 key.MakeNewKey(true); 373 uint256 merkle_root = m_rng.rand256(); 374 375 // secp256k1 functions 376 secp256k1_keypair keypair; 377 BOOST_CHECK(secp256k1_keypair_create(secp256k1_context_sign, &keypair, UCharCast(key.begin()))); 378 secp256k1_xonly_pubkey xonly_pubkey; 379 BOOST_CHECK(secp256k1_keypair_xonly_pub(secp256k1_context_sign, &xonly_pubkey, nullptr, &keypair)); 380 unsigned char xonly_bytes[32]; 381 BOOST_CHECK(secp256k1_xonly_pubkey_serialize(secp256k1_context_sign, xonly_bytes, &xonly_pubkey)); 382 uint256 tweak_old = XOnlyPubKey(xonly_bytes).ComputeTapTweakHash(&merkle_root); 383 384 // CPubKey 385 CPubKey pubkey = key.GetPubKey(); 386 uint256 tweak_new = XOnlyPubKey(pubkey).ComputeTapTweakHash(&merkle_root); 387 388 BOOST_CHECK_EQUAL(tweak_old, tweak_new); 389 390 secp256k1_context_destroy(secp256k1_context_sign); 391 } 392 393 BOOST_AUTO_TEST_SUITE_END()